The paper “Validity of the hyperbolic Whitham modulation equations in Sobolev spaces“, co-authored by Tom Bridges, Anna Kostianko, and Sergey Zelik, has been published in the Journal of Differential Equations. The paper proves that modulation of periodic wave trains, of the defocusing nonlinear Schrödinger equation, can be approximated by solutions of the Whitham modulation equations, […]
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